Water supply coated plastic steel pipe, also known as water supply coated plastic composite steel pipe, water supply steel-plastic composite pipe, and water supply plastic coated composite steel pipe, is based on steel pipes. Steel plastic composite steel pipes that melt a layer of plastic anti-corrosion layer on the inner surface of the steel pipe (bottom pipe) or melt a plastic anti-corrosion layer on the inner and outer surfaces through spraying, rolling, soaking, and adsorption processes. Plastic coated steel pipes have excellent corrosion resistance and relatively low friction resistance.